What is resultset in JDBC with example

A ResultSet object is a table of data representing a database result set, which is usually generated by executing a statement that queries the database. For example, the CoffeeTables. viewTable method creates a ResultSet , rs , when it executes the query through the Statement object, stmt .

What is ResultSet explain with example?

A ResultSet object maintains a cursor that points to the current row in the result set. The term “result set” refers to the row and column data contained in a ResultSet object. The methods of the ResultSet interface can be broken down into three categories − Navigational methods − Used to move the cursor around.

What are the types of ResultSet?

Forward-only. As name suggest, this type can only move forward and are non-scrollable.
Scroll-insensitive. This type is scrollable which means the cursor can move in any direction. …
Scroll-sensitive. …
Forward-only. …
Scroll-insensitive. …
Scroll-sensitive.

What is ResultSet in JDBC in Java?

A ResultSet is a Java object that contains the results of executing an SQL query. In other words, it contains the rows that satisfy the conditions of the query. The data stored in a ResultSet object is retrieved through a set of get methods that allows access to the various columns of the current row. The ResultSet.

What are the type of ResultSet in JDBC?

Based on the concurrency there are two types of ResultSet object. CONCUR_READ_ONLY: The ResultSet is read-only, this is the default concurrency type. CONCUR_UPDATABLE: We can use the ResultSet update method to update the rows data.

How many types of JDBC are there?

There are 4 types of JDBC drivers: Type-1 driver or JDBC-ODBC bridge driver. Type-2 driver or Native-API driver. Type-3 driver or Network Protocol driver.

Which of the following is correct about JDBC?

Q.Which of the following is correct about JDBC?A.JDBC architecture decouples an abstraction from its implementation.B.JDBC follows a bridge design pattern.

How do you read ResultSet?

To read data using the ResultSet ‘s methods (e.g. getString() , getInt() , getFloat() , etc) we can either use the column name, or the column index of the field read in the SQL statement.

What is ResultSet next?

Interface ResultSet. … The next method moves the cursor to the next row, and because it returns false when there are no more rows in the ResultSet object, it can be used in a while loop to iterate through the result set. A default ResultSet object is not updatable and has a cursor that moves forward only.

How many result sets available with the JDBC?

There are two types of result sets namely, forward only and, bidirectional.

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What is meant by JDBC?

Java™ database connectivity (JDBC) is the JavaSoft specification of a standard application programming interface (API) that allows Java programs to access database management systems.

What are the major component of the JDBC?

DriverManager. The DriverManager class keeps track of the available JDBC drivers and creates database connections for you. …
Driver. The Driver interface is primarily responsible for creating database connections. …
Connection. …
Statement. …
ResultSet.

What is the default type of ResultSet in JDBC?

The default ResultSet type is TYPE_FORWARD_ONLY .

What is ResultSet in DBMS?

An SQL result set is a set of rows from a database, as well as metadata about the query such as the column names, and the types and sizes of each column. Depending on the database system, the number of rows in the result set may or may not be known. … A result set is effectively a table.

What is a ResultSet in Python?

As ResultSet is sub-classed from a Python list, it behaves exactly as a Python list object. … ResultSet contains a list of query results, where each item in the list is a Marvin ResultRow object.

Which of the following is correct about ResultSet class of JDBC?

Explanation. Statement encapsulates an SQL statement which is passed to the database to be parsed, compiled, planned and executed. Q 10 – Which of the following is correct about ResultSet class of JDBC? A – ResultSet holds data retrieved from a database after you execute an SQL query using Statement objects.

What statements are correct about JDBC transactions?

[_] [a] A transaction is a set of successfully executed statements in the database.
[_] [b] A transaction is finished when commit() or rollback() is called on the Connection object,
[_] [c] A transaction is finished when commit() or rollback() is called on the Transaction object.

Which steps involved in JDBC connectivity?

Import JDBC packages.
Load and register the JDBC driver.
Open a connection to the database.
Create a statement object to perform a query.
Execute the statement object and return a query resultset.
Process the resultset.
Close the resultset and statement objects.
Close the connection.

What is JDBC architecture?

Java Database Connectivity (JDBC) architecture is an API specifying interfaces for accessing relational databases. JDBC helps to connect to a database, send queries and updates to the database, and retrieve and process the results obtained from the database for queries.

What is the use of JDBC?

JDBC makes it possible to do establish a connection with a data source, send queries and update statements, and process the results. Simply, JDBC makes it possible to do the following things within a Java application: Establish a connection with a data source. Send queries and update statements to the data source.

What are the benefits of JDBC?

It is capable of reading any database. …
It automatically creates the XML format of data from the database.
It does not require the content to be converted.
It provides full support to query and stored procedure.
It provides support to both Synchronous and Asynchronous processing.
It supports modules.

Which method is returns ResultSet in JDBC?

MethodDescriptiongetType()Returns the ResultSet type.isAfterLast()Returns true if the ResultSet points after the last row. False if not.

Is ResultSet empty Java?

The JDBC ResultSet doesn’t provide any isEmpty(), length() or size() method to check if its empty or not. Hence, when a Java programmer needs to determine if ResultSet is empty or not, it just calls the next() method and if next() returns false it means ResultSet is empty.

How can I get ResultSet size?

Simply iterate on ResultSet object and increment rowCount to obtain size of ResultSet object in java. rowCount = rs. getRow();

How do you create a ResultSet object in Java?

import java.sql.*;
class FetchRecord{
public static void main(String args[])throws Exception{
Class.forName(“oracle.jdbc.driver.OracleDriver”);
Connection con=DriverManager.getConnection(“jdbc:oracle:thin:@localhost:1521:xe”,”system”,”oracle”);

Which class is used for handling errors in JDBC?

SQLException class is available in java. sql package and extends Exception class which means all methods that we used to use in Exception will be available in SQLException also.

What is use of setAutoCommit false in JDBC?

setAutoCommit(false) will allow you to group multiple subsequent Statement s under the same transaction. This transaction will be committed when connection. commit() is invoked, as opposed to after each execute() call on individual Statement s (which happens if autocommit is enabled).

How many result set available with the JDBC 2.0 core API from the following Mcq?

Q.How many Result sets available with the JDBC 2.0 core API?C.4D.5Answer» b. 3

What is updatable result set?

An updatable ResultSet object allows us to update a column value, insert column values and delete a row. Here the code snippet that makes a scrollable and updatable result set object. PreparedStatement stmt = conn.

What is JDBC RowSet?

A RowSet is an object that encapsulates a set of rows from either java Database Connectivity (JDBC) result sets or tabular data sources. RowSets support component-based development models like JavaBeans, with a standard set of properties and an event notification mechanism.

What are JDBC components explain in detail?

JDBC API: It is a Java abstraction which enables applications to communicate with relational databases. It provides two main packages namely, java. sql and javax. sql. It provides classes and methods to connect with a database, create statements (quires), execute statements and handle the results.